I ran a QuickLoad analysis for 7-08REM/140SierraSP/55,000psi/2.800"OAL/16.5" barrel.

RL-17 easily ran away with the top spot for velocity in the mid 2650's. As Factory loads run at pressures higher than 55,000, RL-17 gives you a lot of room to manuever faster as suits your purpose/conforms with safe workup. It's also 97.5% burned by barrel end, so muzzle blast/flash is minimized.